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XLSB to XLSX

Turn a binary .xlsb workbook into a standard .xlsx file any program can open.

10 / 10 free files today

Related tools

All Spreadsheets tools →
Numbers to XLSXOpen an Apple Numbers file and save it as Excel .xlsx — no Mac required.ODS to XLSXConvert a LibreOffice Calc .ods sheet to Excel .xlsx without installing anything.XLS to XLSXConvert a legacy .xls workbook to the modern .xlsx format, in your browser.XLSM to XLSXSave a macro-enabled .xlsm workbook as a plain .xlsx, leaving the macros behind.XLSX to ODSConvert an Excel workbook to OpenDocument .ods for LibreOffice Calc.CSV to ExcelConvert a CSV file (or pasted CSV) into a real .xlsx spreadsheet.Extract Excel formulasList every formula in a workbook with its sheet and cell, to audit or document it. Reads Excel (XLSX, XLSM), OpenDocument (ODS) and Apple Numbers, in any language — a French SI() or a German WENN() comes out as written. XLS and XLSB carry formulas that this reader cannot always surface, and CSV or TSV hold none by design: they store results, never formulas.Excel to CSVConvert an .xlsx or .xls sheet to CSV, pick which sheet.

XLSB to XLSX works straight from this page — free, instant, nothing to install. You will find it under Spreadsheets, with Numbers to XLSX and ODS to XLSX for the neighbouring cases.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does XLSB to XLSX do?

Turn a binary .xlsb workbook into a standard .xlsx file any program can open.

When would I actually use this?

Getting a table out of a workbook and into something else — JSON for an API, CSV for an import, HTML for a page — opening a file whose software you do not have, and cleaning a sheet before you hand it on.

What is the most common mistake?

Expecting the formula to survive the trip. A converted file carries the last value the spreadsheet computed, not the calculation behind it — and a workbook written by a program can carry the formula with no cached value at all, which most readers discard along with the cell.

How is XLSB to XLSX different from Numbers to XLSX?

They sit next to each other but answer different questions: Numbers to XLSX is the one to open when you need it to open an Apple Numbers file and save it as Excel .xlsx — no Mac required. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

ODS to XLSX is the closest one after this: Convert a LibreOffice Calc .ods sheet to Excel .xlsx without installing anything.

What else is worth having open alongside it?

XLS to XLSX and XLSM to XLSX — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Nothing leaves the browser. An .xlsx and an .ods are both zipped XML, read here against their published specifications. Dates are the fragile part — a spreadsheet date is a number counted from an epoch the workbook itself declares, so the same 45000 is two different days depending on a flag most files never show you.

Further reading

All guides →
ComparisonXLS, XLSX, XLSM and XLSB: Which Is Which, and Which You WantFour extensions, three of them the same box with different lids. Rename an XLSX to .zip and it opens — that single fact explains the whole family, and explains why XLS, which does not, is the one still causing trouble.ExplainerWhy Your CSV Breaks Accents and Dates in ExcelThree completely different faults hide behind the same sentence. One is the encoding, one is the separator, one is Excel guessing at types while it opens the file — and the fix for each is different. Here is how to tell them apart in five seconds.ExplainerConverting Formulas to Values Keeps the Cached Answer, Not the CalculationA spreadsheet file stores both the formula and the last answer Excel computed. Stripping the formula leaves the stored answer — and leaves a blank wherever the file never carried one.ExplainerThe Number 1 and the Text "1" Are Not DuplicatesDeduplication compares whole rows exactly, cell type included. Five identical-looking rows came out as three, because one held a number, one a string and one a string with a leading space.ExplainerSemicolon, Tab, Pipe: Choosing a Delimiter That Survives the TripWhy the reader's language decides the delimiter, what the converter does to the quoting when you switch, what the sep= first line really is, and the count of quoted cells on the same export written five ways.ComparisonZIP or TAR: Which One, and Why It MattersOne structural difference explains everything else: TAR does not compress, it only stacks; ZIP compresses each file on its own. Measured on 60 small source files, that is the difference between 1,809 bytes and 14,686.